tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 449dc8c97089a6e09fb2dac4d92b1b7ac0eb7c1e commit: 670d0a4b10704667765f7d18f7592993d02783aa sparse: use identifiers to define address spaces date: 7 weeks ago config: parisc-randconfig-s032-20200808 (attached as .config) compiler: hppa-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.2-118-ge1578773-dirty git checkout 670d0a4b10704667765f7d18f7592993d02783aa # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' ARCH=parisc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/pci/endpoint/functions/pci-epf-test.c:288:24: sparse: expected void *dest drivers/pci/endpoint/functions/pci-epf-test.c:288:24: sparse: got void [noderef] __iomem *[assigned] dst_addr drivers/pci/endpoint/functions/pci-epf-test.c:288:34: sparse: sparse: incorrect type in argument 2 (different address spaces) @@ expected void const *src @@ got void [noderef] __iomem *[assigned] src_addr @@ drivers/pci/endpoint/functions/pci-epf-test.c:288:34: sparse: expected void const *src drivers/pci/endpoint/functions/pci-epf-test.c:288:34: sparse: got void [noderef] __iomem *[assigned] src_addr vim +288 drivers/pci/endpoint/functions/pci-epf-test.c 5893c2e5353bb9 Kishon Vijay Abraham I 2020-03-16 226 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 227 static int pci_epf_test_copy(struct pci_epf_test *epf_test) 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 228 { 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 229 int ret; 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 230 bool use_dma; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 231 void __iomem *src_addr; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 232 void __iomem *dst_addr; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 233 phys_addr_t src_phys_addr; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 234 phys_addr_t dst_phys_addr; 5893c2e5353bb9 Kishon Vijay Abraham I 2020-03-16 235 struct timespec64 start, end; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 236 struct pci_epf *epf = epf_test->epf; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 237 struct device *dev = &epf->dev; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 238 struct pci_epc *epc = epf->epc; 3235b994950d84 Kishon Vijay Abraham I 2017-08-18 239 enum pci_barno test_reg_bar = epf_test->test_reg_bar; 3235b994950d84 Kishon Vijay Abraham I 2017-08-18 240 struct pci_epf_test_reg *reg = epf_test->reg[test_reg_bar]; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 241 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 242 src_addr = pci_epc_mem_alloc_addr(epc, &src_phys_addr, reg->size); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 243 if (!src_addr) { 798c0441bec8c4 Gustavo Pimentel 2018-05-14 244 dev_err(dev, "Failed to allocate source address\n"); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 245 reg->status = STATUS_SRC_ADDR_INVALID; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 246 ret = -ENOMEM; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 247 goto err; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 248 } 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 249 4494738de0d9dc Cyrille Pitchen 2018-01-30 250 ret = pci_epc_map_addr(epc, epf->func_no, src_phys_addr, reg->src_addr, 4494738de0d9dc Cyrille Pitchen 2018-01-30 251 reg->size); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 252 if (ret) { 798c0441bec8c4 Gustavo Pimentel 2018-05-14 253 dev_err(dev, "Failed to map source address\n"); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 254 reg->status = STATUS_SRC_ADDR_INVALID; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 255 goto err_src_addr; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 256 } 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 257 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 258 dst_addr = pci_epc_mem_alloc_addr(epc, &dst_phys_addr, reg->size); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 259 if (!dst_addr) { 798c0441bec8c4 Gustavo Pimentel 2018-05-14 260 dev_err(dev, "Failed to allocate destination address\n"); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 261 reg->status = STATUS_DST_ADDR_INVALID; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 262 ret = -ENOMEM; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 263 goto err_src_map_addr; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 264 } 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 265 4494738de0d9dc Cyrille Pitchen 2018-01-30 266 ret = pci_epc_map_addr(epc, epf->func_no, dst_phys_addr, reg->dst_addr, 4494738de0d9dc Cyrille Pitchen 2018-01-30 267 reg->size); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 268 if (ret) { 798c0441bec8c4 Gustavo Pimentel 2018-05-14 269 dev_err(dev, "Failed to map destination address\n"); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 270 reg->status = STATUS_DST_ADDR_INVALID; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 271 goto err_dst_addr; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 272 } 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 273 5893c2e5353bb9 Kishon Vijay Abraham I 2020-03-16 274 ktime_get_ts64(&start); 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 275 use_dma = !!(reg->flags & FLAG_USE_DMA); 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 276 if (use_dma) { 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 277 if (!epf_test->dma_supported) { 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 278 dev_err(dev, "Cannot transfer data using DMA\n"); 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 279 ret = -EINVAL; 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 280 goto err_map_addr; 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 281 } 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 282 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 283 ret = pci_epf_test_data_transfer(epf_test, dst_phys_addr, 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 284 src_phys_addr, reg->size); 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 285 if (ret) 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 286 dev_err(dev, "Data transfer failed\n"); 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 287 } else { 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 @288 memcpy(dst_addr, src_addr, reg->size); 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 289 } 5893c2e5353bb9 Kishon Vijay Abraham I 2020-03-16 290 ktime_get_ts64(&end); 5893c2e5353bb9 Kishon Vijay Abraham I 2020-03-16 291 pci_epf_test_print_rate("COPY", reg->size, &start, &end, use_dma); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 292 5ebf3fc59bd20d Kishon Vijay Abraham I 2020-03-16 293 err_map_addr: 4494738de0d9dc Cyrille Pitchen 2018-01-30 294 pci_epc_unmap_addr(epc, epf->func_no, dst_phys_addr); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 295 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 296 err_dst_addr: 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 297 pci_epc_mem_free_addr(epc, dst_phys_addr, dst_addr, reg->size); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 298 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 299 err_src_map_addr: 4494738de0d9dc Cyrille Pitchen 2018-01-30 300 pci_epc_unmap_addr(epc, epf->func_no, src_phys_addr); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 301 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 302 err_src_addr: 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 303 pci_epc_mem_free_addr(epc, src_phys_addr, src_addr, reg->size); 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 304 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 305 err: 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 306 return ret; 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 307 } 349e7a85b25fa6 Kishon Vijay Abraham I 2017-03-27 308 :::::: The code at line 288 was first introduced by commit :::::: 349e7a85b25fa6ee82902d9be2cc5f3bec815120 PCI: endpoint: functions: Add an EP function to test PCI :::::: TO: Kishon Vijay Abraham I <kishon(a)ti.com&gt; :::::: CC: Bjorn Helgaas <bhelgaas(a)google.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org